1648818700897 has 2 divisors, whose sum is σ = 1648818700898. Its totient is φ = 1648818700896.

The previous prime is 1648818700871. The next prime is 1648818700999. The reversal of 1648818700897 is 7980078188461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1143992819776 + 504825881121 = 1069576^2 + 710511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648818700897 - 2⁷ = 1648818700769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1648818706897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824409350448 + 824409350449.

It is an arithmetic number, because the mean of its divisors is an integer number (824409350449).

Almost surely, 2^{1648818700897} is an apocalyptic number.

It is an amenable number.

1648818700897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648818700897 is an equidigital number, since it uses as much as digits as its factorization.

1648818700897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43352064, while the sum is 67.

The spelling of 1648818700897 in words is "one trillion, six hundred forty-eight billion, eight hundred eighteen million, seven hundred thousand, eight hundred ninety-seven".